Pantograph equipment for grouped embroidering-machines



H. CORRALL.

PANTOGRAPH EouwMENT Foa GRouPED EMBROIDERING MACHINES.

APPLICATION FILED FEB. I4, 1917.

Patented Jan. 27, 1920.

2 SHEETS-SHEET l.

INVENTOR M W' fnllnlllllflfr.

WITNESS T RNEY H. CORRALL. PANTOGRAPH EQUIPMENT FOR GROUPED EMBROIDERING MACHINES. APPLICATION FILED FEB. I4. 1917.

1,328,821. Patented Jan.27,1920.

' 2 SHEETS-SHEEI 2.

MVENTOR M, www

- ATTORNEY UNITED STATESPATENT OFFICE.

HERBERTQCQRRALL, -oEfPARKv 1Ew',` HEIjENsRURGE; sc'cTLANn Assi"einen To THE SINGER MANUFACTURING COMPANY, A CORPORATION .0E NEw JERSEY.

Be lit known that.' LeHRRBERT GORRALL, a` subject; of:` the King'y o-"the 'UnitedKingdom of- Great lBritain Vand Ireland, (andfresiding, at` Parkview, Helensburgh, `Dumbartonshire,/y Scotland,l havev invented certain` newy and useful Improvements' inPantog-raph Equip l ments:fonGroupedjEmbroidering-Machines,ff v of" whichV the following lis a a= specification, referencebeinghad therein; to" the accom?.- panying` V drawings.

T-hesuhe 't ofithis inventions apantograph equipment for groupedlvembroidering'g machines as shown yand" 'describ"edl in,l the UnitedA States Patent-to 'Herbert Corralland' James M2 Forbes, No 1,159,9015-fdated'No-- vem'beni 9, 1915," for imparting simultaneouslyl to a number of" work-clamps---movementsy similar to those? traced by a pointerl `orthelike-manipulatedby an operator;

An object of the` invention is to 'provide' a' constructionv which permits of' variation of the-scale yof reproduction with adjustment-lat a minimum number o'- points, the vvpoints O'f adjustment being all within1 convenient reach of` the operator-y stationedl at'r one' end of' thegroup`v` of embroidering'f machines: Further objects and advantages 'will apliearI Jfrom 'the followingdescription. i

The improvement is illustratedinthe-accompanying drawing@ in v which?vv 1 is a plan showing two of' afs'eries of? workclamps and Fig. 2 is a front elevation showing the frame or structure by which the work-clamps are carried. Figs. 3 and 4 are sectional elevations illustrating the means for vertically adjusting the work clamps and the devices for suspending the supporting structure. Figs. 5, 6, 7 and 8 illustrate structural details.

Referring to the drawings, it will be seen that the work-clamps 1 are sustained by a rigid frame or structure adapted t0 perform translatory movements while remaining parallel to initial position and com rising the parallel bars 2 having adj ustably c amped upon their opposite end portions the crossmembers 2 respectively provided with a left hand extension 3 and a right hand eX- tension 4. To the latter is pivoted at 5 one end of a link 6 connected at the opposite end 7 to one arm 8 of a bellcrank-lever or rocker which is mounted on a ixed fulcrum 9 and has its other arm 10 connected by the link 11 with one arm 12 of a secondbellcrankj specincatibfmfPatent. Patentduamzv,1920., Application-mea Eebruaryfm, '1917i o seria'1fNo.14s;5o4.`

lever orroc-ker whic'lr'is'*mountedvon affixed;

fulcrum v13""and hasits othenarm 14"apivw...`

otally.` connected at! l15 with a`- link'llbyf" whichy it: isi connected -at' 17` to l'the lefthand. extension; 3 ofthe cross-member 2,

The righthand extension 4 isl forined at` thereto*whichl is undercut; or' otherwise.' adapted @to"'for1n'af guideway-lfor 'ai block v'187' Stud 18'." and l the members 21j; .22; jointed? aft-23, the .member 215 being alsojcintcdftf the l member 19 at'` 24; and the* 'memberI 22"" beingiljoindto'thc-member 20`A atom-Janen: ten-sion 22"` olf the`member22f'being'fpivoted atthe fixed point-26fi- Formed* as an extension of the member 21 is an operatingarrn 21 carrying a" pointer` 29; j

It will be" seen r thatgraduatiorrsareA formed on the `guidelmember 18,y `andonfthe members forming5'the`:sides'oftlic "arallelol grain, provision beingiliade;` for a justment of the connection-of the sides-- at 24 and'f-at lation Vtoy the'v guide'w'ay.'

soi

The operation of'` he pantogiaph is; e'fA fected inthe'v usualmanne'; the-movement ofthe pointer '29; beingfaccompaniedbyj deflormation of ythe quadrilateraland? disfil'afz'e worlcclamps. j

The bell crank-levers are mounted on suitable bearings and sustain the link 11 clear of contact with the'under side of the top of the bench or table sustaining the group of machines I), whilethe supportin structure may be suspended from suita 1y chosen points by any usual or suitable means.

The work-clamps are maintained in light operative contact with the machine beds,

veach clamp having a rigid arm 27 hinged `clamps 1s, in a preferred form of the invention, suspended from a member c of a suitable frame by cords d secured to one member'ofa clamp 30 embracing the framemembers 2 and thereby permitsit to movev freely above and closely adjacent to the' bench lor table, horizontally or parallel with the top of the bench or tab-le. It Will beob-y served that the bellcrank-,levers or rockers 8,1() and 12, 14, as Well as the link 11 connecting the rockers, are mounted upon the tabley independently of the Work-sustaining structure' 2, and that the parallelogramr, comprising the jointed sides 19, 20, 21 and' 22', is also connected With the Work-sustain-4 ingstructurelindependently of the rockers. The 4parallelogram thus acts directly upon the` work-sustaining structure and also indirectly thereon through therockers 8, 10 and: 12, 14 and their connecting link 11, in imparting and controlling the operative movements ofthe Work-sustaining structure for all variations in amplitude of movement consequent upon adjustments of the` parallelogram. I

Having thus set forth the nature .0f the invention, what I `claim herein is 1.' Ina pantograph equipment for grouped embroidery machines, in combination, a laterally movable Work-sustaining structure, a

, plurality of Workeholders carried thereby,

a pluralityof rockers, a link connection between said rockers, independent link connections between said structure and said rockers, and ra parallelogram directly connected with and adapted to impart operative Workshifting movements to said structure by means of its directconnection and its inried thereby, means VforsupportingV said.

structure for horizontal movement, rockers sustamed independently kof said lstructure,

links connecting the rockers each With said structure independently of said supporting means, a link connecting together'I said rockfers, and a parallelogram llilaviigig a single connection with said structurefindependent of the connections of the structure with said rockers andy provided with adjusting means for producing variations in the--` amplitude of movement effective throughsaid connection with the structure. l, v

3. In a pantograph equipmentvfor grouped embroidery machines, in combination, a. Work sustaining structure supported for horizontal movement, lWork-holders carried `thereby,and a single horizontally disposed parallelogram connected with`l and adapted to impart to said structure Work-shifting' movements in all directions, said parallelogram comprising means aliordmg the sole adjustment `for varying theamplltude ot' movement of the structure under control ol'v the parallelogram. y

In vtestimony whereof I have signed my nameto this specification, in the presence of two subscribing Witnesses. f

V HERBERT CORRALL.

Witnesses: f j f j j WALLACE CRANsToN FAIRWEATHER, v

HENRY MASON. 

